TVR Parts conrods

[spitfire4v8]

A copy and paste on here from the Al Melling facebook page suggests that the missing big end oil grooves and relative lack of big end cap thickness is a major mistake.

However, these conrods must have been used on some / many of the Racing Green FFF full engine rebuilds ..

so the question is : is anyone running the TVR Parts conrods and if so have you had any issues / would you wholeheartedly recommend them ?

• oil grooves could always be machined into the rods afterwards anyway I guess .. ? but big end cap thickness is rather harder to rectify of course!

[Sagi Badger]

Ummhh,

I have tried to break them, didn't like them much when I put them in either....

They are from overseas, better than stock? Defo reckon so, good for my latest project, nah.

Think i may post some pics up soon....

J

[m4tti]

What are you building Jon. Forced induction?

[spitfire4v8]

Are you using high revs .. it's shutting the throttle at high revs that usually breaks rods on the end of a long race straight for example .. rods don't normally break due to forced induction if the revs aren't any higher than normal.

I want to build a high rev 4 litre - the sp6 has a peaky power delivery so to maximise the use of the power you really need to be able to rev it high to drop into a useful power band in the next gear.

[Sagi Badger]

Ummhhh, don't want to say toooooooo much but yes, high engine speeds

I have removed as much inertia as I can, more details to follow as I build it.
I have machined two blocks and made new caps that register etc., think I will not say any more.... one is being built to 4.5 the other 4.0 both will rev.
I am altering the inlets and the throttle linkage, again wait for the pics.
I am trying to understand the cam profiles as I want a longer duration, this is the expensive bit as the maths only gets you so close...
The exhaust, yep you guessed it.
I am getting vibration analysis done, yep I know.
The chain arrangement wont look the same, that's about all I can say about that...
There are various bespoke internals that I have tested on my other sixes.
The clutch is my MKV, don't ask why.

This has been 4 years work and has been mothballed for a year because my daughter bought a house and said "Dadddddddd you're a builder... and smiled like daughters do.

I know who is going to map it.....

This will be my last pair of Speed sixes, after this I may have to sell my body to raise the funds to build another one, this will take f'ing years with my body.

If my wife finds out I will be cursed royally, if a red Griff owner from Wiltshire mutters a word he will be visited by the management....

[m4tti]

For what it’s worth. I used the Racing Green/TVR parts rods.

I took the whole reciprocating/rotating mass to Julian Godfrey motor sport for balancing. They said the rods were reasonably well balanced out of the box.. and within in 1/2 gram of each other.

That was good enough for me.

[m4tti]

Sagi Badger said:

Ummhhh, don't want to say toooooooo much but yes, high engine speeds

I have removed as much inertia as I can, more details to follow as I build it.
I have machined two blocks and made new caps that register etc., think I will not say any more.... one is being built to 4.5 the other 4.0 both will rev.
I am altering the inlets and the throttle linkage, again wait for the pics.
I am trying to understand the cam profiles as I want a longer duration, this is the expensive bit as the maths only gets you so close...
The exhaust, yep you guessed it.
I am getting vibration analysis done, yep I know.
The chain arrangement wont look the same, that's about all I can say about that...
There are various bespoke internals that I have tested on my other sixes.
The clutch is my MKV, don't ask why.

This has been 4 years work and has been mothballed for a year because my daughter bought a house and said "Dadddddddd you're a builder... and smiled like daughters do.

I know who is going to map it.....

This will be my last pair of Speed sixes, after this I may have to sell my body to raise the funds to build another one, this will take f'ing years with my body.

If my wife finds out I will be cursed royally, if a red Griff owner from Wiltshire mutters a word he will be visited by the management....

Don’t mess about jon ditch the chain, go cam drive you don’t want any chain stretch affecting your timing

[Don1]

My engine is full FFF and ~450bhp. Redlines when you want it to. Standard bottom end. Gets tracked and regularly exercised. I assume it has those in it.